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1 | #ifndef _LINUX_FS_NOTIFY_H |
2 | #define _LINUX_FS_NOTIFY_H | |
3 | ||
4 | /* | |
5 | * include/linux/fsnotify.h - generic hooks for filesystem notification, to | |
6 | * reduce in-source duplication from both dnotify and inotify. | |
7 | * | |
8 | * We don't compile any of this away in some complicated menagerie of ifdefs. | |
9 | * Instead, we rely on the code inside to optimize away as needed. | |
10 | * | |
11 | * (C) Copyright 2005 Robert Love | |
12 | */ | |
13 | ||
14 | #ifdef __KERNEL__ | |
15 | ||
16 | #include <linux/dnotify.h> | |
17 | #include <linux/inotify.h> | |
18 | ||
19 | /* | |
20 | * fsnotify_move - file old_name at old_dir was moved to new_name at new_dir | |
21 | */ | |
22 | static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir, | |
23 | const char *old_name, const char *new_name, | |
75449536 | 24 | int isdir, struct inode *target) |
0eeca283 RL |
25 | { |
26 | u32 cookie = inotify_get_cookie(); | |
27 | ||
28 | if (old_dir == new_dir) | |
29 | inode_dir_notify(old_dir, DN_RENAME); | |
30 | else { | |
31 | inode_dir_notify(old_dir, DN_DELETE); | |
32 | inode_dir_notify(new_dir, DN_CREATE); | |
33 | } | |
34 | ||
35 | if (isdir) | |
36 | isdir = IN_ISDIR; | |
37 | inotify_inode_queue_event(old_dir, IN_MOVED_FROM|isdir,cookie,old_name); | |
38 | inotify_inode_queue_event(new_dir, IN_MOVED_TO|isdir, cookie, new_name); | |
75449536 JM |
39 | |
40 | if (target) { | |
41 | inotify_inode_queue_event(target, IN_DELETE_SELF, 0, NULL); | |
42 | inotify_inode_is_dead(target); | |
43 | } | |
0eeca283 RL |
44 | } |
45 | ||
7a91bf7f JM |
46 | /* |
47 | * fsnotify_nameremove - a filename was removed from a directory | |
48 | */ | |
49 | static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) | |
50 | { | |
51 | if (isdir) | |
52 | isdir = IN_ISDIR; | |
53 | dnotify_parent(dentry, DN_DELETE); | |
54 | inotify_dentry_parent_queue_event(dentry, IN_DELETE|isdir, 0, dentry->d_name.name); | |
55 | } | |
56 | ||
57 | /* | |
58 | * fsnotify_inoderemove - an inode is going away | |
59 | */ | |
60 | static inline void fsnotify_inoderemove(struct inode *inode) | |
61 | { | |
62 | inotify_inode_queue_event(inode, IN_DELETE_SELF, 0, NULL); | |
63 | inotify_inode_is_dead(inode); | |
64 | } | |
65 | ||
0eeca283 RL |
66 | /* |
67 | * fsnotify_create - 'name' was linked in | |
68 | */ | |
69 | static inline void fsnotify_create(struct inode *inode, const char *name) | |
70 | { | |
71 | inode_dir_notify(inode, DN_CREATE); | |
72 | inotify_inode_queue_event(inode, IN_CREATE, 0, name); | |
73 | } | |
74 | ||
75 | /* | |
76 | * fsnotify_mkdir - directory 'name' was created | |
77 | */ | |
78 | static inline void fsnotify_mkdir(struct inode *inode, const char *name) | |
79 | { | |
80 | inode_dir_notify(inode, DN_CREATE); | |
81 | inotify_inode_queue_event(inode, IN_CREATE | IN_ISDIR, 0, name); | |
82 | } | |
83 | ||
84 | /* | |
85 | * fsnotify_access - file was read | |
86 | */ | |
87 | static inline void fsnotify_access(struct dentry *dentry) | |
88 | { | |
89 | struct inode *inode = dentry->d_inode; | |
90 | u32 mask = IN_ACCESS; | |
91 | ||
92 | if (S_ISDIR(inode->i_mode)) | |
93 | mask |= IN_ISDIR; | |
94 | ||
95 | dnotify_parent(dentry, DN_ACCESS); | |
96 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
97 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
98 | } | |
99 | ||
100 | /* | |
101 | * fsnotify_modify - file was modified | |
102 | */ | |
103 | static inline void fsnotify_modify(struct dentry *dentry) | |
104 | { | |
105 | struct inode *inode = dentry->d_inode; | |
106 | u32 mask = IN_MODIFY; | |
107 | ||
108 | if (S_ISDIR(inode->i_mode)) | |
109 | mask |= IN_ISDIR; | |
110 | ||
111 | dnotify_parent(dentry, DN_MODIFY); | |
112 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
113 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
114 | } | |
115 | ||
116 | /* | |
117 | * fsnotify_open - file was opened | |
118 | */ | |
119 | static inline void fsnotify_open(struct dentry *dentry) | |
120 | { | |
121 | struct inode *inode = dentry->d_inode; | |
122 | u32 mask = IN_OPEN; | |
123 | ||
124 | if (S_ISDIR(inode->i_mode)) | |
125 | mask |= IN_ISDIR; | |
126 | ||
0eeca283 | 127 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); |
5995f16b | 128 | inotify_inode_queue_event(inode, mask, 0, NULL); |
0eeca283 RL |
129 | } |
130 | ||
131 | /* | |
132 | * fsnotify_close - file was closed | |
133 | */ | |
134 | static inline void fsnotify_close(struct file *file) | |
135 | { | |
136 | struct dentry *dentry = file->f_dentry; | |
137 | struct inode *inode = dentry->d_inode; | |
138 | const char *name = dentry->d_name.name; | |
139 | mode_t mode = file->f_mode; | |
140 | u32 mask = (mode & FMODE_WRITE) ? IN_CLOSE_WRITE : IN_CLOSE_NOWRITE; | |
141 | ||
142 | if (S_ISDIR(inode->i_mode)) | |
143 | mask |= IN_ISDIR; | |
144 | ||
145 | inotify_dentry_parent_queue_event(dentry, mask, 0, name); | |
146 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
147 | } | |
148 | ||
149 | /* | |
150 | * fsnotify_xattr - extended attributes were changed | |
151 | */ | |
152 | static inline void fsnotify_xattr(struct dentry *dentry) | |
153 | { | |
154 | struct inode *inode = dentry->d_inode; | |
155 | u32 mask = IN_ATTRIB; | |
156 | ||
157 | if (S_ISDIR(inode->i_mode)) | |
158 | mask |= IN_ISDIR; | |
159 | ||
160 | inotify_dentry_parent_queue_event(dentry, mask, 0, dentry->d_name.name); | |
161 | inotify_inode_queue_event(inode, mask, 0, NULL); | |
162 | } | |
163 | ||
164 | /* | |
165 | * fsnotify_change - notify_change event. file was modified and/or metadata | |
166 | * was changed. | |
167 | */ | |
168 | static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid) | |
169 | { | |
170 | struct inode *inode = dentry->d_inode; | |
171 | int dn_mask = 0; | |
172 | u32 in_mask = 0; | |
173 | ||
174 | if (ia_valid & ATTR_UID) { | |
175 | in_mask |= IN_ATTRIB; | |
176 | dn_mask |= DN_ATTRIB; | |
177 | } | |
178 | if (ia_valid & ATTR_GID) { | |
179 | in_mask |= IN_ATTRIB; | |
180 | dn_mask |= DN_ATTRIB; | |
181 | } | |
182 | if (ia_valid & ATTR_SIZE) { | |
183 | in_mask |= IN_MODIFY; | |
184 | dn_mask |= DN_MODIFY; | |
185 | } | |
186 | /* both times implies a utime(s) call */ | |
187 | if ((ia_valid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) | |
188 | { | |
189 | in_mask |= IN_ATTRIB; | |
190 | dn_mask |= DN_ATTRIB; | |
191 | } else if (ia_valid & ATTR_ATIME) { | |
192 | in_mask |= IN_ACCESS; | |
193 | dn_mask |= DN_ACCESS; | |
194 | } else if (ia_valid & ATTR_MTIME) { | |
195 | in_mask |= IN_MODIFY; | |
196 | dn_mask |= DN_MODIFY; | |
197 | } | |
198 | if (ia_valid & ATTR_MODE) { | |
199 | in_mask |= IN_ATTRIB; | |
200 | dn_mask |= DN_ATTRIB; | |
201 | } | |
202 | ||
203 | if (dn_mask) | |
204 | dnotify_parent(dentry, dn_mask); | |
205 | if (in_mask) { | |
206 | if (S_ISDIR(inode->i_mode)) | |
207 | in_mask |= IN_ISDIR; | |
208 | inotify_inode_queue_event(inode, in_mask, 0, NULL); | |
209 | inotify_dentry_parent_queue_event(dentry, in_mask, 0, | |
210 | dentry->d_name.name); | |
211 | } | |
212 | } | |
213 | ||
214 | #ifdef CONFIG_INOTIFY /* inotify helpers */ | |
215 | ||
216 | /* | |
217 | * fsnotify_oldname_init - save off the old filename before we change it | |
218 | */ | |
219 | static inline const char *fsnotify_oldname_init(const char *name) | |
220 | { | |
221 | return kstrdup(name, GFP_KERNEL); | |
222 | } | |
223 | ||
224 | /* | |
225 | * fsnotify_oldname_free - free the name we got from fsnotify_oldname_init | |
226 | */ | |
227 | static inline void fsnotify_oldname_free(const char *old_name) | |
228 | { | |
229 | kfree(old_name); | |
230 | } | |
231 | ||
232 | #else /* CONFIG_INOTIFY */ | |
233 | ||
234 | static inline const char *fsnotify_oldname_init(const char *name) | |
235 | { | |
236 | return NULL; | |
237 | } | |
238 | ||
239 | static inline void fsnotify_oldname_free(const char *old_name) | |
240 | { | |
241 | } | |
242 | ||
243 | #endif /* ! CONFIG_INOTIFY */ | |
244 | ||
245 | #endif /* __KERNEL__ */ | |
246 | ||
247 | #endif /* _LINUX_FS_NOTIFY_H */ |